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Memorias de investigación
Artículos en revistas:
Efficient inversion of three-dimensional finite element models of volcano deformation
Año:2014
Áreas de investigación
  • Matemáticas,
  • Fisica ep -- fisica de la tierra y de los planetas
Datos
Descripción
Numerical techniques, as such as finite element method, allow for the inclusion of features, such as topography and/or mechanical heterogeneities, for the interpretation of volcanic deformation. However, models based on these numerical techniques usually are not suitable to be included in non-linear estimations of source parameters based on explorative optimization schemes because they require a calculation of the numerical approach for every evaluation of the misfit function. We present a procedure for finite element (FE) models that can be combined with explorative inversion schemes. The methodology is based on including a body force term representing an infinitesimal source in the model formulation that is responsible for pressure (volume) changes in the medium. This provides significant savings in both the time required for mesh generation and actual computational time of the numerical approach. Furthermore, we develop an inversion algorithm to estimate those parameters that characterize the changes in location and pressure (volume) of deformation sources. Both provide FE inversions in a single step, avoiding remeshing and assembly of the linear system of algebraic equations that define the numerical approach and/or the automatic mesh generation. After providing the theoretical basis for the model, the numerical approach and the algorithm for the inversions, we test the methodology using a synthetic example in a stratovolcano. Our results suggest that the FE inversion methodology can be considered suitable for efficiently save time in quantitative interpretations of volcano deformation.
Internacional
Si
JCR del ISI
Si
Título de la revista
GEOPHYSICAL JOURNAL INTERNATIONAL
ISSN
0956-540X
Factor de impacto JCR
2,853
Información de impacto
Volumen
196
DOI
10.1093/gji/ggt490
Número de revista
3
Desde la página
1441
Hasta la página
1454
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: María Charco (CSIC)
  • Autor: Pedro Galan Del Sastre (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Matemática Aplicada
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